Composition for coating boilers and pipes



names sriai is RALPH DEANE ASLATT, OF MARTINEZ, CALIFORNIA.

COMPOSITION FOR COATING- BOILEEIS AND PIPES.

No Drawing.

To all whom it may concern:

Be it known that I, RALPH Dnann A'sLA'r'r, a subject of the King of Great Britain, residing at Martinez, in the county of Contra Costa and State of California, have invented certain new and useful Improvements in Compositions for Coating Boilers and Pipes; and l do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to plastic coating compositions, and more specifically to an improved composition for coating boilers and pipes for heat insulatlng purposes.

Several objects of this invention are to pro vide a coating composition of this character which can be manufactured at an exceedingly low cost, can be kept a very great length of time without spoiling, is very quickly and easily prepared, by mixing with cold water, so that the max mum convenience is obtained at the minimum cost.

A further object is to provide a dry or comparatively dry composition whlch, when properly mixed with water, is very easily applied, being very adhesive, and which, when applied, will not corrode or cause corrosion to the surface coated therewith, is quite hard when set and dry, does not crack from shrinking, is fire-proof, and is sufficiently porous tO P6IIl1lt steam or water to pass therethrough, so that any leak 111 the surface coated therewith can be easily detected and located.

Other objects and advantages will be pointed out or implied in the following details of description:

In preparing this composition, the best results appear to be obtained by m1x1ng,-

2 parts, by measure, of powdered or comminuted dry chalk;

1 part, by measure, of powdered or comminuted dry clay;

9 parts, by measure, of comminuted or loose vegetable pulp-fiber;

9 parts, by measure, of comminuted or loose textile fiber.

In practice, the clay may be of the kind obtained either from dry land or from the beds of rivers and other bodies of water, the essential feature being that it produces a plastic or adhesive material when mixed with the proper quantity of water or other liquid. The vegetable pulp fiber may be Specification of Letters Patent. Pmtig t d Eg 2@ 1921 Application filed. May 20, 1920. Serial No. 382,904.

of the kind obtained from wood, or other vegetatlon and, for the sake of comparative cheapness, it is found advantageous to utilize waste paper, pasteboard, etc. The textile fiber may consist of wool, hair, cotton or other vegetable fiber having length and strength suiiicient to be woven or fabricated; but, for the sake of comparative cheapness, this textile fiber is preferably obtained from old rags, old rope, etc.

Where the composition is to be used immediately, or to be shipped in air-tight containers for subsequent use, the comminuted chalk and fiber may be mixed with the mud or clay in the plastic state of the latter, so that little or no water need be added to give the composition the proper plastic consistency. However, for the sake of comparative cheapness, where the composition is to be handled as an article of merchandise in large quantities, it is preferable to mix the ingredients dry, after being reduced to p0wder or granules and lint, whereupon, this dry mixture may be placed in bags, barrels, hogsheads or boxes, or may be shipped loose in cars or other conveyances to dealers and consumers.

The term comminuted, as applied to vegetable pulp fiber and textile fiber, is intended to distinguish from such fibers in a woven or fabricated state, or in other words, it is intended to distinguish between fiber in an interengaged state and fiber in the state where the fiber-strands are separated or disengaged from one another.

Where the composition is in the dry state, it must be prepared for use by mixing it with a sufficient quantity of water or other liquid to produce a plastic material of the consistency of common mortar, and it may be applied in successive coats, one upon the other, by means of the hand or by any appropriate means. Where a comparatively small surface is to be coated, such as a steampipe or a small boiler, the user may apply the first one or two coats with his hands, dabbing the first coat on roughly so as to obtain a secure foundation for the subsequent coats. When the first coat has dried, the second coat can be laid, pressed and evened with the hand, and when a third coat is desirable, this may either be applied with the hand or atrowel, and should be smoothed with a trowel where a smooth surface is desirable. If it is desirable that the surface be very smooth and even, it should be troweled after it has dried considerably, but be fore it has entirely dried. A thickness of tWo inches may be obtained with 3 coats, as no appreciable shrinking or crackingof the aggregate coat need'be apprehended. hen applying the first coat, the surface of the pipe or boiler should not be too hot, and to avoid overheatingof the pipe, the steam pressure should not exceed 10 pounds. However, when the third coat is applied, the pressure should be as great as the normal Working pressure.

It is not intended to limit this invention to the exact ingredients and proportions specified in the foregoing, but changes may be made Within the scope of the inventive idea as implied and claimed.

What I claim as my invention is z y 1. The composition to be mixed with liquid for producing a plastic coating mateure, viz., 2 parts comminuted chalk, 1 part comminuted dry clay, 9 parts comminuted vegetable pulp-fiber, 9 parts comminuted textile fiber.

3. A plastic coating composition compris mg by measure, tWo partscomminuted chalk,

one part commiuuted clay, nine parts comminuted vegetablepulp-fiber, and nine parts comminuted textile fiber.

In testimony whereof I have hereunto set my hand.

RALPH DEANE ASLATT. W'itness;

' B. L. BoYER. 

